APAR status
Closed as program error.
Error description
A message was published with a size which was close to the MAXMSGL of the Qmgr. The message was matched to a durable subscriber with its destination set to a remote queue so the Qmgr put the message to an transmission queue. The sender channel attempted to get the message from the XMITQ, but the MQGET failed with MQRC_TRUNCATED_MSG_FAILED, even though the buffer allocated by the sender channel was big enough for the message, including its properties. The reason the MQGET failed was: the message size + XMITQ header + pub/sub message properties exceeded the MAXMSGL of the Qmgr. The MQGET failed repeatedly, forever, and the channel could move no more messages.
Local fix
Increase the MAXMSGL parameter on the queue manager, transmit queue, and channel.
Problem summary
**************************************************************** USERS AFFECTED: Those using message channels (queue manager to queue manager channels), when messages close to the MAXMSGL are being published by the applications. Platforms affected: MultiPlatform **************************************************************** PROBLEM DESCRIPTION: The sender channel code was not coded to expect this scenario.
Problem conclusion
The sender channel code has been corrected to deal with this scenario. The sender channel code will now retry the MQGET in this scenario, using a Message Handle to receive the properties. If the message can be retrieved in this way, it will be put to the Dead Letter Queue. If the message cannot be retrieved the channel will stop. In either case an error message will be written to the queue manager error log. --------------------------------------------------------------- The fix is targeted for delivery in the following PTFs: Version Maintenance Level v9.2 LTS 9.2.0.30 v9.3 LTS 9.3.0.20 v9.4 LTS 9.4.0.5 v9.x CD 9.4.1 The latest available maintenance can be obtained from 'IBM MQ Recommended Fixes' https://www.ibm.com/support/pages/recommended-fixes-ibm-mq If the maintenance level is not yet available information on its planned availability can be found in 'IBM MQ Planned Maintenance Release Dates' https://ibm.biz/mqplannedmaintenance ---------------------------------------------------------------
Temporary fix
Comments
APAR Information
APAR number
IT44384
Reported component name
MQ BASE V9.2
Reported component ID
5724H7281
Reported release
920
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2023-08-15
Closed date
2024-05-07
Last modified date
2024-07-16
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
MQ BASE V9.2
Fixed component ID
5724H7281
Applicable component levels
[{"Business Unit":{"code":"BU048","label":"IBM Software"},"Product":{"code":"SSYHRD","label":"IBM MQ"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"920","Line of Business":{"code":"LOB67","label":"IT Automation \u0026 App Modernization"}}]
Document Information
Modified date:
16 July 2024